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Volume 1965 (1965)
- Issue 43 Pages 2-
- Issue 42 Pages 3-
- Issue 41 Pages 3-
Volume 1965, Issue 43
Displaying 1-7 of 7 articles from this issue
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H. Ishikawa, T. Ichiki1965 Volume 1965 Issue 43 Pages 2-8
Published: November 10, 1965
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSCommutation condition is determined by load current and interpole flux density. Then authors framed a equipment for observing black band of d.c. machine by cathode ray oscillograph. The oscillograph draw a black band and commutation condition under the transient state, and the intensity of the beam spot is modulated by the brush sparks. Then we are able to observe the sphere of spark on commutation condition under the transient state.
The results show that the brush sparks occur when the commutation condition under the transient state is off the black band under the steady state. And the time constant of eddy current is smaller than the calculated result of Rudenberg's equation.View full abstractDownload PDF (9961K) -
1965 Volume 1965 Issue 43 Pages 8
Published: 1965
Released on J-STAGE: March 01, 2011
JOURNAL FREE ACCESSDownload PDF (143K) -
Seishi Yajima, Toshio Hirai1965 Volume 1965 Issue 43 Pages 9-12
Published: November 10, 1965
Released on J-STAGE: March 01, 2011
JOURNAL FREE ACCESSThe Research Institute For Iron, Steel and Other Metals. Tohoku University. Effects of the roughness of graphite substrate on the properties of pyrolytic graphite have been examined. Pyrolytic graphite is obtained by pyrolysis of commercial propane gas at the deposition temperature of 2025°C, the pressure of 10mm Hg and the flow rate of 640cc/min by direct heat method. The three kinds of roughness of the substrates are obtained using of abrassive papers (05, 280). The effects are not remarkable as compared with that of the deposition temperature and gas pressure, but can not be ignored. In the case of the smooth surface (abrassive paper 05), the surface of the deposit is smooth and the microstructure is fine, in which the crack does not appear. Furthermore, the formation rate is large, the ordering is good and the preferred orientation is remarkable. But in the case of the rough surface, the above mentioned phenomena tend to appear in the reverse side. Especially, the electrical resistivity of c-axis in the smooth case is about 10per cent higher than that of the rough surface. However, there are inconsiderable difference in the lattice constant and density between the smooth and rough surfaces.View full abstractDownload PDF (1174K) -
Yutaka ISHIHARA1965 Volume 1965 Issue 43 Pages 13-17
Published: November 10, 1965
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIt is well known that the intrinsic photoconduction in an anthracene crystal changes exponentially with temperature. In order to study the generation mechanism of free carriers in an anthracene crystal, a pulsed photoconduction measurement has been performed. The thermal activation energy for the intrinsic photoconduction has been found to depend on the excitation wavelength. The activation energy is constant for the wavelength range shorter than the fundamental absorption edge, however, for the longer wavelength region, it increases linearly as the wavelength increases. In the fundamental absorption region, a constant value of 0.14eV is obtained as the activation energy both for holes and electrons. The activation energy is independent of the crystal orientation. The temperature and crystal orientation dependences of the drift mobility are discussed. Excepting the case of electron in the direction perpendicular to (ab)-plane, the drift mobilities decrease as the temperature rises. A model of energy levels is proposed for the charge carrier generation.View full abstractDownload PDF (666K) -
Isao Yamada1965 Volume 1965 Issue 43 Pages 18-23
Published: November 10, 1965
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe reactions between carbon and metals such as thermal black (T.B.) and silicon, T.B. and iron etc. were investigated by means of X-ray diffraction and chemical analysis.
The (002) diffraction profile of the sample had two peaks, one of which was attributable to heat-treated T.B. and the other to graphite. This fact constitutes that the sample is a mixture of heat-treated T.B. and graphite crystals. So, the quantity of formed graphite crystals was estimated by using as a standard a heat-treated T.B. and a natural graphite mixture of a known ratio.
From the quantitative relationship between formed graphite and residual matter it was considered that silicon forms graphite crystals by formation and decompostion of silicon carbide and iron segregates graphite crystals from iron-carbon melt. The curve of quantity of formed graphite vs. heating time a unique feature according to the kind of metal, and in this connection, it was considered that metals can be divided into two types, that is silicon-type and iron-type. Also, it was found that no marked increase in the quantity of formed graphite can be expected as a result of repeated reaction between carbon and metal.View full abstractDownload PDF (714K) -
Yoshimi Matsumura1965 Volume 1965 Issue 43 Pages 24-31
Published: November 10, 1965
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThis paper is concerned with the theories and the experimental results on the breakdown of dynamic adsorption of gas streams through active carbon column.
Kinetic theory of dynamic gas adsorption has been developed as the concept of adsorption wave by many investigators, and it interpretes the observed data in the wide range of adsorption conditions, except both of the effluent gas concentration at the initial range of breakdown and of the relation between the influent gas concentration and the breakdown time. Here, the theory was discussed in comparison of the observed results.
Also, the reviews are given on some semiempirical methods, like Mecklenberg's concept, MTZ approach and the pulse test methods.
The relation between the dynamic and static adsorption was considered at last, which lead to the new and convenient method to obtain the general relation between the influent gas concentration and the breakdown time.View full abstractDownload PDF (956K) -
[in Japanese]1965 Volume 1965 Issue 43 Pages 32-35
Published: November 10, 1965
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (442K)
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